3-(2-Bromo-1H-indol-3-yl)-2-((S)-2-((tert-butoxycarbonyl)amino)-N-methylpropanamido)propanoic N,N’-dicyclohexylcarbamimidic Anhydride is an intermediate in the synthesis of Jasplakinolide (J210700), an potent inhibitor of prostrate and breast carcinoma cell proliferation.